Preheat the oven to 350°F (175°C).
In a large skillet, brown the sausage over medium heat.
Add the diced onion and celery to the skillet; sauté until softened.
Stir in the minced garlic, sage, and thyme; cook for another minute.
In a large mixing bowl, combine the bread cubes, sausage mixture, and broth.
Season with salt and pepper, adjusting to taste; mix well.
Transfer the mixture to a greased baking dish, spreading it evenly.
Cover the baking dish with aluminum foil and bake for 25 minutes.
Remove the foil and bake for an additional 15-20 minutes, or until golden.